deliverability SKILL.md skillA
deliverability from 808enzo/chappie is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add 808enzo/chappie/deliverability@git:20261009.fdb6855Pins git:20261009.fdb6855 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- 808enzo/chappie
- Path
skills/deliverability/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261009.fdb6855, committed Oct 9, 2026
- First version recorded
- Sep 17, 2026
- Size
- 16,235 bytes
- Repository stars
- 2
- License
- MIT
Decide how your mail identifies itself to mailbox providers, earns volume, and recovers when a provider stops letting it through. Use when mail stops arriving at one provider, a domain lands on a blocklist, bounces or complaints spike, or a new domain starts sending. Not what goes out or to whom (email-program) or the template (email-design).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# deliverability This skill answers one question: **does the mail arrive where it can be seen, and what do you do when it stops.** Not what the message says, and not who receives it: those belong to the neighbors. What lives here is the construction of the sending side, how it identifies itself to the receiving side, what it uses to prove the identity is its own, the reputation it has accumulated, and what to do when a provider stops letting it through. What sets this work apart from the rest of the library opens `references/deliverability-vocabulary.md`. The unit is **a sending identity paired with a mailbox provider, read over a period**: the flow of mail from one authenticated identity (the sending domain, its signatures, and the IP or pool it physically leaves through) to one provider. It is larger than a message and smaller than a program. One message that failed to reach one person is not a deliverability event. A flow that stopped reaching one provider while another still accepts it is one. Before your first step, read `.agents/chappie-context.md` in the project if it exists. It records the …
Read the whole file at its exact version.
How to install
mdr add 808enzo/chappie/deliverability@sha256:054ab4c0d66108bbThe line at the top of this page pins the label git:20261009.fdb6855, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_a4f7iatuurw5fuqi)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Sep 17, 2026 and Oct 9, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.fdb6855 latest | 2026-10-09 | fdb6855 | 16,235 B | A | view · diff |
| git:20260928.bfcaa99 | 2026-09-28 | bfcaa99 | 16,111 B | A | view · diff |
| git:20260927.10df614 | 2026-09-27 | 10df614 | 15,267 B | A | view · diff |
| git:20260917.0d90f8f | 2026-09-17 | 0d90f8f | 23,111 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (16235 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
808enzo/chappie · 2 stars · license MIT · pushed 2026-10-15 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_a4f7iatuurw5fuqi GET https://markdownregistry.com/api/v1/resolve?ref=808enzo/chappie/deliverability GET https://markdownregistry.com/api/v1/blob/054ab4c0d66108bbdc05dca13890e1c8b836f572f12db47da23256d0f7b900e3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.